Double Matrix

brute force, greedy

Winding polygonal line

constructive algorithms, geometry, greedy, math

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

The Party and Sweets

binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Minimum Array

binary search, data structures, greedy

N Problems During K Days

constructive algorithms, greedy, math

Increasing Subsequence (hard version)

greedy

Increasing Subsequence (easy version)

greedy

Long Number

greedy

Optimizer

graphs, greedy, hashing, implementation

Match Points

binary search, greedy, sortings, ternary search, two pointers

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Beautiful Array

brute force, data structures, divide and conquer, dp, greedy

Game with Telephone Numbers

games, greedy, implementation

Minimum Possible LCM

brute force, greedy, math, number theory

Shovels Shop

dp, greedy, sortings

Walking Robot

greedy

Serval and Rooted Tree

binary search, dfs and similar, dp, greedy, trees

Serval and Parenthesis Sequence

greedy, strings

Serval and Toy Bricks

constructive algorithms, greedy

Neko and Aki's Prank

dp, greedy, trees

Neko Finds Grapes

greedy, implementation, math

Stas and the Queue at the Buffet

greedy, math, sortings

Tiling Challenge

greedy, implementation

Stock Arbitraging

greedy, implementation

Abandoning Roads

brute force, dp, graphs, greedy

Prefix Sum Primes

constructive algorithms, greedy, math, number theory

Earth Wind and Fire

constructive algorithms, greedy, math, sortings, two pointers

Dirty Deeds Done Dirt Cheap

greedy, sortings

Another One Bites The Dust

greedy

Two Merged Sequences

dp, greedy

Equalize Them All

constructive algorithms, greedy

Parity Alternated Deletions

greedy, implementation, sortings

Privatization of Roads in Treeland

binary search, constructive algorithms, dfs and similar, graphs, greedy, trees

Same Sum Blocks (Hard)

data structures, greedy

Same Sum Blocks (Easy)

greedy

Colored Boots

greedy, implementation

Minimum Triangulation

dp, greedy, math

Chocolates

greedy, implementation

Circus

brute force, greedy, math, strings

Sushi for Two

binary search, greedy, implementation

Train Car Selection

data structures, greedy

Camp Schedule

greedy, hashing, strings

Nastya Is Buying Lunch

greedy

Spanning Tree with One Fixed Degree

constructive algorithms, dfs and similar, dsu, graphs, greedy

Knapsack

dfs and similar, dp, greedy

Stressful Training

binary search, greedy

Discounts

greedy, sortings

Regular Bracket Sequence

greedy, implementation

String Multiplication

dp, greedy, strings

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Birthday

binary search, greedy, sortings

Draw!

greedy, implementation

Two Cakes

greedy

Toy Train

brute force, greedy

Toy Train (Simplified)

brute force, greedy

Secret Letters

data structures, dp, greedy

Power Tree

dfs and similar, dp, dsu, graphs, greedy, trees

Once in a casino

constructive algorithms, greedy, implementation, math

Diana and Liana

greedy, implementation, two pointers

Pavel and Triangles

brute force, dp, fft, greedy, ternary search

Ramesses and Corner Inversion

constructive algorithms, greedy, implementation, math

Alyona and a Narrow Fridge

binary search, flows, greedy, sortings

Ilya and a Colorful Walk

greedy, implementation

Coffee and Coursework (Hard Version)

binary search, greedy

Coffee and Coursework (Easy version)

brute force, greedy

Emotes

greedy, math, sortings

Yet Another Array Partitioning Task

constructive algorithms, greedy, sortings

Got Any Grapes?

brute force, greedy, implementation

Sasha and Magnetic Machines

greedy, number theory

Sasha and His Trip

dp, greedy, math

Tape

greedy, sortings

MST Unification

binary search, dsu, graphs, greedy

Array and Segments (Easy version)

brute force, greedy, implementation

Diverse Garland

constructive algorithms, dp, greedy

Nice Garland

brute force, greedy, math

Divisors of Two Integers

brute force, greedy, math, number theory

Brutality

greedy, sortings, two pointers

Digits Sequence Dividing

greedy, strings

Lunar New Year and a Wander

data structures, dfs and similar, graphs, greedy, shortest paths

Lunar New Year and Number Division

greedy, implementation, math, sortings

Balanced Ternary String

greedy, strings

Array K-Coloring

greedy, sortings

Accordion

greedy, implementation

Ivan and Burgers

data structures, divide and conquer, greedy, math

Construct a tree

binary search, constructive algorithms, dfs and similar, graphs, greedy, trees

Nice table

brute force, constructive algorithms, greedy, math

Sum in the tree

constructive algorithms, dfs and similar, greedy, trees

Egor and an RPG game

constructive algorithms, greedy

Yuhao and a Parenthesis

greedy, implementation

Find Divisible

greedy, implementation, math

Make It Connected

dsu, graphs, greedy

Powers Of Two

bitmasks, greedy

Mishka and the Last Exam

greedy

Letters Rearranging

constructive algorithms, greedy, sortings, strings

Minimal Diameter Forest

constructive algorithms, dfs and similar, greedy, trees

Great Vova Wall (Version 1)

greedy, implementation, math

New Year and the Mallard Expedition

constructive algorithms, greedy

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings